I suggest large doses of Meth Amphetamine.
Meth is for *******, I suggest adrenochrome, that stuff is hardcore.
But in all seriousness, just get decent sleep and eat properly, I'd only suggest amphetamines for someone with ADHD. They have quite a specific effect on sufferers of the condition, If I take them I get mellowed out rather than stimulated letting me focus on one thing rather than my usual mentally hyperactive state.
If you don't suffer from ADHD you'll likely need to steadily increase the dose to experience the effects you want, amphetamine addiction and psychosis is not fun.